The password hint is quite easy to google translate. It's clear that you need to get certain knowledge about Fate Grand Order to realise the password: https://en.wikipedia.org/wiki/Fate/Grand_Order . Have you played the online game? Have you watched the animated movie? Have you read all wikia about FGO on the Internet? I have zero knowledge about FGO. You want that FGO model, so you need to make an effort to acquire that FGO knowledge.